Results 51 to 60 of about 8,411 (265)

Bathymetry Inversion Using Full Tensor Gravity Gradients: A Case Study in the Bay of Bengal

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Conventional methods for bathymetry inversion based on gravity field data usually adopt gravity anomaly and vertical gravity gradient. Indeed, a gravity gradient tensor (GGT) has six components.
Xiaoyun Wan, Lijun Zhang, Hengyang Guo, Richard Fiifi Annan   +3 more
doaj   +1 more source

Multidirectional Motion Strategy of Miniature Water Surface Robot Actuated by Single Exciter

Advanced Robotics Research, EarlyView.
A novel multidirectional motion strategy on the water surface based on a single exciter is proposed, and a single‐exciter single‐plate module is developed for actuation. The driving forces generation mechanism of the module is revealed from the perspective of the asymmetric surface wave field.
Haoxuan He, Dehong Wang, Jing Li, Shijing Zhang, Yingxiang Liu   +4 more
wiley   +1 more source

3D Simultaneous Inversion and Modeling of Full Tensor Gravity and Gravity Data for Salt Imaging

Geosciences
In this study, we performed three-dimensional gravity modeling and inversion of the Vinton Dome, a well-known onshore salt structure located in southwestern Louisiana, USA, by simultaneously integrating Full Tensor Gravity (FTG) and conventional gravity ...
Carlos Ortiz-Alemán, Sebastian López-Juárez, Carlos Couder-Castañeda, Alfredo Trujillo-Alcántara, Jaime Meléndez-Martínez, Andrés Ambros-Vargas   +5 more
doaj   +1 more source

Massively parallel 3D inversion of gravity and gravity gradiometry data [PDF]

Preview, 2011
Reliance on desktop computers limits the scale of 3D inversion of gravity and gravity gradiometry surveys, making it impractical to achieve an appropriate level of resolution and detail for geological interpretation. To begin with, airborne surveys are characterised by very large data volumes.
Glenn Wilson, Martin Čuma, Michael S. Zhdanov   +2 more
openaire   +1 more source

TreeSpider: In‐Canopy Exploration With Tether‐Based Aerial Modular Arms

Advanced Robotics Research, EarlyView.
A tethered drone with perching arms and a 360° ring enables unprecedented maneuverability within dense forest canopies. By dynamically adjusting tether length and decoupling pitch from the frame, it navigates between branches, senses multiple trees, and interacts physically with foliage.
Luca Romanello, Tian Lan, Salaheldin Hassan, Maximilian Leutschafft, Erdem Ekinci, Sophie F. Armanini, Mirko Kovac, Basaran Bahadir Kocer   +7 more
wiley   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Inversion of satellite gravimetric data from Recôncavo-Tucano-Jatobá Basin System

Brazilian Journal of Geology, 2020
Density differences among subsurface rocks cause variations in the gravitational field of Earth, which is known as gravity anomaly. Interpretation of these gravity anomalies allows assessment of the probable depth and shape of the causative body.
Thaíza Pereira Bessoni, Amin Bassrei, Luiz Gabriel Souza de Oliveira   +2 more
doaj   +1 more source

Asymmetry in Skipping Enhances Viability Against Control Input Noise

Advanced Robotics Research, EarlyView.
Quadruped animals use asymmetric galloping gaits at high speeds, yet the functional role of this asymmetry remains unclear. This study shows that left–right asymmetry in touchdown angles enhances robustness to control noise. Using a simple two‐legged locomotion model and viability theory, it demonstrates that asymmetric skipping substantially enlarges ...
Yuichi Ambe, Alvin So, Shinya Aoi
wiley   +1 more source

Echinoderm‐Inspired Autonomy for Soft‐Legged Robots

Advanced Robotics Research, EarlyView.
Inspired by echinoderms, a modular soft robot achieves autonomous phototaxis without a central controller or explicit communication. Each limb independently adapts its actuation timing through local sensing and short‐term memory. Coordination emerges purely from physical interactions, demonstrating resilience to changes in morphology, environment, and ...
Harmannus A. H. Schomaker, Jelle de Vries, Johannes T. B. overvelde   +2 more
wiley   +1 more source

Gauging spacetime inversions in quantum gravity

, 2023
67 pages plus appendices, 22 figures. Violates causality and modifies quantum mechanics, but not in a bad way. Hopefully. v2: fixes a bug in our derivation of the CRT transformation, which results in an extra factor of i for fermions; conclusions are ...
Harlow, Daniel, Numasawa, Tokiro
openaire   +2 more sources